In Kindred Spirit by H.A. Wills, readers are transported into a richly woven tapestry of mystery and supernatural intrigue that elegantly spans both historical and contemporary settings. Wills masterfully crafts a narrative that not only delves into the complexities of the human spirit but also explores the timeless connections that bind us across the ages.

The novel opens with an enthralling scene in the bustling streets of Victorian London where we meet Eliza, a young woman with the uncanny ability to perceive spirits. The story then shifts to present-day Chicago, introducing us to Sarah, a pragmatic librarian who discovers she is inexplicably linked to Eliza through a series of haunting dreams. It’s through these interconnected timelines that Wills weaves a gripping mystery that could potentially unite or utterly destroy these women separated by centuries.

One of the standout elements of Kindred Spirit lies in its rich character development. Eliza's character shines with depth and complexity as she grapples with her supernatural abilities, which are perceived as both a gift and a curse. Her journey of self-discovery and her struggle to use her powers for good provide a poignant counterbalance to Sarah's more modern, skeptical viewpoint. Sarah, on the other hand, brings a layer of practicality and resilience that speaks volumes about her character’s adaptability in the face of bizarre, inexplicable phenomena.

The narrative structure employed by Wills is nothing short of brilliant. Alternating between the past and present, Wills expertly builds suspense and fosters a palpable connection between readers and her protagonists. This dual narrative not only enriches the story but also provides a fascinating contrast between past and present societal norms and attitudes towards the supernatural. Furthermore, the transitions between the two timelines are seamless and intuitive, preventing any potential confusion and maintaining a brisk, engaging pace throughout the novel.

Impeccably researched, the historical sections of Kindred Spirit feel authentic and vibrant. Wills's meticulous attention to detail is evident in her descriptions of Victorian London, from the fog-laden streets to the stiff social etiquettes of the time. This historical authenticity not only enriches the novel's setting but also adds a crucial layer of believability to the supernatural elements, making them feel all the more tangible and intertwined with the characters' realities.

The thematic depth of Kindred Spirit is one of its most compelling attributes. Wills does not merely present a supernatural mystery; she probes deeper into questions of identity, destiny, and human connection. Both Eliza and Sarah confront philosophical dilemmas that challenge their beliefs about free will and predetermination, elevating the novel from a simple ghost story to a profound exploration of existential themes.

Moreover, Wills incorporates a balanced mix of suspense, emotion, and occasional humor to create a well-rounded narrative. The mystery element is meticulously plotted, with twists and turns that are both surprising and satisfying. The novel’s climax, in particular, is powerfully executed, providing a resolution that is both unexpected and thought-provoking.

It's worth noting that while the supernatural aspects are central to the story, Kindred Spirit is accessible even to those who might not typically gravitate towards the genre. The human drama and historical insights offer plenty of interest for a broad audience, making this novel a versatile pick for book clubs or casual readers looking for a compelling blend of mystery, history, and supernatural.

The prose itself is another highlight. Wills’s writing style is eloquent yet accessible, rich with descriptive detail but devoid of unnecessary complexity. This clarity helps in emphasizing the emotional and thematic depths of the story, making the novel a pleasure to read.

In conclusion, Kindred Spirit by H.A. Wills is a meticulously crafted novel that offers much more than its intriguing premise suggests. Through its splendid character arcs, seamless narrative structure, historical authenticity, and deep thematic currents, it provides a fulfilling and thought-provoking experience. This book is a commendable addition to both the historical fiction and supernatural genres, promising to captivate readers with its blend of suspense, history, and ghostly whispers from the past. Overall, H.A. Wills has delivered an unforgettable narrative that resonates long after the final page is turned.